Top 350+ Solved Automobile Engineering MCQ Questions Answer
Q. In forced feed lubrication system the device used to guard against excessive oil pressure is known as
a. Balancer
b. Stop valve
c. Release chamber
d. Pressure actuator
e. Relief valve
Q. In actual practice, the exhaust value of a four stroke I.C. engine should close
a. exactly at the end of expansion stroke
b. slightly before the end of exhaust stroke
c. slightly after the end of exhaust stroke
d. none of the above
e. None of the above
Q. Latex
a. A milky juice of rubber
b. A plastic
c. A cover on wires carrying current to spark plugs
d. A variety of lubricant
e. A variety of P.V.C.
Q. The pressure of air for braking in case of heavy duty trucks in usually of the order of
a. Depends upon the road conditions
b. 1 to 2 atm
c. 14 to 17 atm
d. 4 to 7 atm
e. 2 to 3 atm
Q. The operation of removing trapped air from hydraulic braking system is known as
a. Pressurization
b. Tapping
c. Trapping
d. Clearing
e. Bleeding
Q. For faultless operation of hydraulic braking system
a. Brake fluid should be pure
b. Boiling point of brake fluid should be high
c. Viscosity of brake fluid should be high
d. There should be minimum amount of trapped air
e. All of the above
Q. If the first element of the fuel and C.I. air is having high temperature and a short ignition delay, then knocking will
a. accelerate
b. decrease
c. remain constant
d. none of the above
e. None of the above
Q. Noisy brakes indicate
a. Grit on lining
b. Drums scored
c. Loose lining screws
d. Distored brake spiders
e. Any of the above
Q. Steering gear
a. rack and pinion type
b. worm and roller type
c. recirculating ball type
d. Any of the above
e. None of the above
Q. In a ball bearing which is more harder than the other parts?
a. It It depends on the size of bearing
b. Inner race
c. Ball
d. Outer race
e. All are equally hardened
Q. Which of the following symptoms will not show that the combustion is necessarily complete or not?
a. Presence of free carbon in exhaust
b. Presence of carbon monoxide in the exhaust
c. Presence of oxygen is the exhaust
d. Presence of nitrogen in the exhaust
e. None of the above
Q. The turbulence in diesel engine ensures to
a. Increase the compression pressure
b. Reduce the engine vibrations
c. Bring the fuel quickly in contact with air
d. Increase the fuel consumption
e. Increase the volumetric efficiency
Q. In a 2-stroke S.I. engine
a. exhaust and transfer (inlet) ports open and cloe simultaneously
b. exhaust port opens 5? before the transfer port and closes 5? after the transfer port
c. exhaust port opens 5? ahead of the transfer port but both ports close simultaneously
d. none of the above
e. None of the above
Q. In a S.I. engine, if the colour of exhaust flame is bluish, transparent, it indicates that the mixture supplied to the engine is
a. Suitable for maximum output
b. Too lean
c. Too rich
d. Chemical correct
e. Most economical
Q. The escape of burned gases from the combustion chamber past the pistons and into the crank case is called
a. Gas-loss
b. Crank case explosion
c. By-pass
d. Blow-by
e. Passed gas